Covidien SurgiStat, Service Manual

Page: 39 / 112

Te
chnical S
p
ecifications
SurgiStat Low-Power Electrosurgical Generator Service Manual 3-5
Performance Characteristics
The system presents audible and visible alarms when it does not sense a patient return
electrode.
• When a fault condition occurs, the alarm indicator flashes red, an alarm tone sounds,
and the system disables output power.
• The red LED alarm indicator remains illuminated until the condition that caused the
alarm is corrected.
• Activation attempts during an alarm condition result in an audio alarm and the alarm
indicator flashes.
• When the alarm condition is resolved, the green single or split-plate indicator will
illuminate.
• The system measures the return electrode sensing current according to IEC 60601-1.
Low Frequency (50–60 Hz) Leakage Current
High Frequency (RF) Leakage Current
Split-Plate Set resistance: 10
Ω
± 5
Ω
to 135
Ω
± 10
Ω
Continuous measurement:
Once the system establishes the split-plate electrode
resistance, an increase of 40% in resistance will cause
an alarm. When the alarm condition exists, the system
deactivates output power.
Enclosure source
current, ground open < 300 μA
Source current, patient
leads, all outputs Normal polarity, intact ground: < 10 μA
Normal polarity, ground open: < 50 μA
Reverse polarity, ground open: < 50 μA
Sink current at high
line, all inputs < 20 μA
Bipolar RF leakage
current < 39 mA
rms
Monopolar RF leakage
current
(additional tolerance) < 150 mA
rms